Use wherever exposure to water is likely including all outdoor splices, lighting, pump, and all enclosures. UL (Underwriter's Laboratories) listed to 486D for use in damp/wet locations. UL (Underwriter's Laboratories) 50 tested as raintight/watertight. Pre-filled custom sealant locks out moisture and air. No on-site assembly or multipiece kits. Replaces electrical tape and heat shrink. Added ribs for easier twist-on applications. Hexagonal shape allows connectors to be applied with standard nutdriver. Color coded caps. 3 broad range connectors meet twist-on market needs. Maximum voltage 600V (volts), 1000V in fixtures and signs. 221 deg (degrees) F (Fahrenheit)/105 deg Celsius temperature rating. Sealant temperature range -45 deg F to 400 deg F Splices copper-to-copper. Lifetime guarantee.